def train_books(self,
books,
output_model_prefix,
weights=None,
train_to_val=1,
codec_whitelist=None,
codec_keep=False,
n_augmentations=0.1,
max_iters=100000,
display=500,
checkpoint_frequency=-1,
preload=False):
if isinstance(books, str):
books = [books]
dset = Nash5DataSet(DataSetMode.TRAIN, self.cachefile, books)
if 0 < train_to_val < 1:
valsamples = random.sample(dset._samples,
int((1 - train_to_val) * len(dset)))
for s in valsamples:
dset._samples.remove(s)
vdset = Nash5DataSet(DataSetMode.TRAIN, self.cachefile, [])
vdset._samples = valsamples
else:
vdset = None
parser = argparse.ArgumentParser()
setup_train_args(parser, omit=["files", "validation"])
args = parser.parse_known_args()[0]
with h5py.File(self.cachefile, 'r', libver='latest',
swmr=True) as cache:
if all(cache[b].attrs.get("dir") == "rtl" for b in books):
args.bidi_dir = "rtl"
params = params_from_args(args)
params.output_model_prefix = output_model_prefix
params.early_stopping_best_model_prefix = "best_" + output_model_prefix
params.max_iters = max_iters
params.display = display
params.checkpoint_frequency = checkpoint_frequency
trainer = Trainer(params,
dset,
txt_preproc=NoopTextProcessor(),
data_preproc=NoopDataPreprocessor(),
n_augmentations=n_augmentations,
data_augmenter=SimpleDataAugmenter(),
validation_dataset=vdset,
weights=weights,
preload_training=preload,
preload_validation=True,
codec_whitelist=codec_whitelist,
keep_loaded_codec=codec_keep)
trainer.train(progress_bar=True, auto_compute_codec=True)
def run(cfg: CfgNode):
# check if loading a json file
if len(cfg.DATASET.TRAIN.PATH) == 1 and cfg.DATASET.TRAIN.PATH[0].endswith(
"json"):
import json
with open(cfg.DATASET.TRAIN.PATH[0], 'r') as f:
json_args = json.load(f)
for key, value in json_args.items():
if key == 'dataset' or key == 'validation_dataset':
setattr(cfg, key, DataSetType.from_string(value))
else:
setattr(cfg, key, value)
# parse whitelist
whitelist = cfg.MODEL.CODEX.WHITELIST
if len(whitelist) == 1:
whitelist = list(whitelist[0])
whitelist_files = glob_all(cfg.MODEL.CODEX.WHITELIST_FILES)
for f in whitelist_files:
with open(f) as txt:
whitelist += list(txt.read())
if cfg.DATASET.TRAIN.GT_EXTENSION is False:
cfg.DATASET.TRAIN.GT_EXTENSION = DataSetType.gt_extension(
cfg.DATASET.TRAIN.TYPE)
if cfg.DATASET.VALID.GT_EXTENSION is False:
cfg.DATASET.VALID.GT_EXTENSION = DataSetType.gt_extension(
cfg.DATASET.VALID.TYPE)
text_generator_params = TextGeneratorParameters()
line_generator_params = LineGeneratorParameters()
dataset_args = {
'line_generator_params': line_generator_params,
'text_generator_params': text_generator_params,
'pad': None,
'text_index': 0,
}
# Training dataset
dataset = create_train_dataset(cfg, dataset_args)
# Validation dataset
validation_dataset_list = create_test_dataset(cfg, dataset_args)
params = CheckpointParams()
params.max_iters = cfg.SOLVER.MAX_ITER
params.stats_size = cfg.STATS_SIZE
params.batch_size = cfg.SOLVER.BATCH_SIZE
params.checkpoint_frequency = cfg.SOLVER.CHECKPOINT_FREQ if cfg.SOLVER.CHECKPOINT_FREQ >= 0 else cfg.SOLVER.EARLY_STOPPING_FREQ
params.output_dir = cfg.OUTPUT_DIR
params.output_model_prefix = cfg.OUTPUT_MODEL_PREFIX
params.display = cfg.DISPLAY
params.skip_invalid_gt = not cfg.DATALOADER.NO_SKIP_INVALID_GT
params.processes = cfg.NUM_THREADS
params.data_aug_retrain_on_original = not cfg.DATALOADER.ONLY_TRAIN_ON_AUGMENTED
params.early_stopping_at_acc = cfg.SOLVER.EARLY_STOPPING_AT_ACC
params.early_stopping_frequency = cfg.SOLVER.EARLY_STOPPING_FREQ
params.early_stopping_nbest = cfg.SOLVER.EARLY_STOPPING_NBEST
params.early_stopping_best_model_prefix = cfg.EARLY_STOPPING_BEST_MODEL_PREFIX
params.early_stopping_best_model_output_dir = \
cfg.EARLY_STOPPING_BEST_MODEL_OUTPUT_DIR if cfg.EARLY_STOPPING_BEST_MODEL_OUTPUT_DIR else cfg.OUTPUT_DIR
if cfg.INPUT.DATA_PREPROCESSING is False or len(
cfg.INPUT.DATA_PREPROCESSING) == 0:
cfg.INPUT.DATA_PREPROCESSING = [
DataPreprocessorParams.DEFAULT_NORMALIZER
]
params.model.data_preprocessor.type = DataPreprocessorParams.MULTI_NORMALIZER
for preproc in cfg.INPUT.DATA_PREPROCESSING:
pp = params.model.data_preprocessor.children.add()
pp.type = DataPreprocessorParams.Type.Value(preproc) if isinstance(
preproc, str) else preproc
pp.line_height = cfg.INPUT.LINE_HEIGHT
pp.pad = cfg.INPUT.PAD
# Text pre processing (reading)
params.model.text_preprocessor.type = TextProcessorParams.MULTI_NORMALIZER
default_text_normalizer_params(
params.model.text_preprocessor.children.add(),
default=cfg.INPUT.TEXT_NORMALIZATION)
default_text_regularizer_params(
params.model.text_preprocessor.children.add(),
groups=cfg.INPUT.TEXT_REGULARIZATION)
strip_processor_params = params.model.text_preprocessor.children.add()
strip_processor_params.type = TextProcessorParams.STRIP_NORMALIZER
# Text post processing (prediction)
params.model.text_postprocessor.type = TextProcessorParams.MULTI_NORMALIZER
default_text_normalizer_params(
params.model.text_postprocessor.children.add(),
default=cfg.INPUT.TEXT_NORMALIZATION)
default_text_regularizer_params(
params.model.text_postprocessor.children.add(),
groups=cfg.INPUT.TEXT_REGULARIZATION)
strip_processor_params = params.model.text_postprocessor.children.add()
strip_processor_params.type = TextProcessorParams.STRIP_NORMALIZER
if cfg.SEED > 0:
params.model.network.backend.random_seed = cfg.SEED
if cfg.INPUT.BIDI_DIR:
# change bidirectional text direction if desired
bidi_dir_to_enum = {
"rtl": TextProcessorParams.BIDI_RTL,
"ltr": TextProcessorParams.BIDI_LTR,
"auto": TextProcessorParams.BIDI_AUTO
}
bidi_processor_params = params.model.text_preprocessor.children.add()
bidi_processor_params.type = TextProcessorParams.BIDI_NORMALIZER
bidi_processor_params.bidi_direction = bidi_dir_to_enum[
cfg.INPUT.BIDI_DIR]
bidi_processor_params = params.model.text_postprocessor.children.add()
bidi_processor_params.type = TextProcessorParams.BIDI_NORMALIZER
bidi_processor_params.bidi_direction = TextProcessorParams.BIDI_AUTO
params.model.line_height = cfg.INPUT.LINE_HEIGHT
params.model.network.learning_rate = cfg.SOLVER.LR
params.model.network.lr_decay = cfg.SOLVER.LR_DECAY
params.model.network.lr_decay_freq = cfg.SOLVER.LR_DECAY_FREQ
params.model.network.train_last_n_layer = cfg.SOLVER.TRAIN_LAST_N_LAYER
network_params_from_definition_string(cfg.MODEL.NETWORK,
params.model.network)
params.model.network.clipping_norm = cfg.SOLVER.GRADIENT_CLIPPING_NORM
params.model.network.backend.num_inter_threads = 0
params.model.network.backend.num_intra_threads = 0
params.model.network.backend.shuffle_buffer_size = cfg.DATALOADER.SHUFFLE_BUFFER_SIZE
if cfg.MODEL.WEIGHTS == "":
weights = None
else:
weights = cfg.MODEL.WEIGHTS
# create the actual trainer
trainer = Trainer(
params,
dataset,
validation_dataset=validation_dataset_list,
data_augmenter=SimpleDataAugmenter(),
n_augmentations=cfg.INPUT.N_AUGMENT,
weights=weights,
codec_whitelist=whitelist,
keep_loaded_codec=cfg.MODEL.CODEX.KEEP_LOADED_CODEC,
preload_training=not cfg.DATALOADER.TRAIN_ON_THE_FLY,
preload_validation=not cfg.DATALOADER.VALID_ON_THE_FLY,
)
trainer.train(auto_compute_codec=not cfg.MODEL.CODEX.SEE_WHITELIST,
progress_bar=not cfg.NO_PROGRESS_BAR)
def main():
parser = argparse.ArgumentParser()
parser.add_argument('--version',
action='version',
version='%(prog)s v' + __version__)
parser.add_argument(
"--files",
nargs="+",
help=
"List all image files that shall be processed. Ground truth fils with the same "
"base name but with '.gt.txt' as extension are required at the same location",
required=True)
parser.add_argument(
"--text_files",
nargs="+",
default=None,
help="Optional list of GT files if they are in other directory")
parser.add_argument(
"--gt_extension",
default=None,
help="Default extension of the gt files (expected to exist in same dir)"
)
parser.add_argument("--dataset",
type=DataSetType.from_string,
choices=list(DataSetType),
default=DataSetType.FILE)
parser.add_argument("--line_height",
type=int,
default=48,
help="The line height")
parser.add_argument("--pad",
type=int,
default=16,
help="Padding (left right) of the line")
parser.add_argument("--processes",
type=int,
default=1,
help="The number of threads to use for all operations")
parser.add_argument("--n_cols", type=int, default=1)
parser.add_argument("--n_rows", type=int, default=5)
parser.add_argument("--select", type=int, nargs="+", default=[])
# text normalization/regularization
parser.add_argument(
"--n_augmentations",
type=float,
default=0,
help=
"Amount of data augmentation per line (done before training). If this number is < 1 "
"the amount is relative.")
parser.add_argument("--text_regularization",
type=str,
nargs="+",
default=["extended"],
help="Text regularization to apply.")
parser.add_argument(
"--text_normalization",
type=str,
default="NFC",
help="Unicode text normalization to apply. Defaults to NFC")
parser.add_argument("--data_preprocessing",
nargs="+",
type=DataPreprocessorParams.Type.Value,
choices=DataPreprocessorParams.Type.values(),
default=[DataPreprocessorParams.DEFAULT_NORMALIZER])
args = parser.parse_args()
# Text/Data processing
if args.data_preprocessing is None or len(args.data_preprocessing) == 0:
args.data_preprocessing = [DataPreprocessorParams.DEFAULT_NORMALIZER]
data_preprocessor = DataPreprocessorParams()
data_preprocessor.type = DataPreprocessorParams.MULTI_NORMALIZER
for preproc in args.data_preprocessing:
pp = data_preprocessor.children.add()
pp.type = preproc
pp.line_height = args.line_height
pp.pad = args.pad
# Text pre processing (reading)
text_preprocessor = TextProcessorParams()
text_preprocessor.type = TextProcessorParams.MULTI_NORMALIZER
default_text_normalizer_params(text_preprocessor.children.add(),
default=args.text_normalization)
default_text_regularizer_params(text_preprocessor.children.add(),
groups=args.text_regularization)
strip_processor_params = text_preprocessor.children.add()
strip_processor_params.type = TextProcessorParams.STRIP_NORMALIZER
text_preprocessor = text_processor_from_proto(text_preprocessor)
data_preprocessor = data_processor_from_proto(data_preprocessor)
print("Resolving input files")
input_image_files = sorted(glob_all(args.files))
if not args.text_files:
if args.gt_extension:
gt_txt_files = [
split_all_ext(f)[0] + args.gt_extension
for f in input_image_files
]
else:
gt_txt_files = [None] * len(input_image_files)
else:
gt_txt_files = sorted(glob_all(args.text_files))
input_image_files, gt_txt_files = keep_files_with_same_file_name(
input_image_files, gt_txt_files)
for img, gt in zip(input_image_files, gt_txt_files):
if split_all_ext(os.path.basename(img))[0] != split_all_ext(
os.path.basename(gt))[0]:
raise Exception(
"Expected identical basenames of file: {} and {}".format(
img, gt))
if len(set(gt_txt_files)) != len(gt_txt_files):
raise Exception(
"Some image are occurring more than once in the data set.")
dataset = create_dataset(
args.dataset,
DataSetMode.TRAIN,
images=input_image_files,
texts=gt_txt_files,
non_existing_as_empty=True,
)
if len(args.select) == 0:
args.select = range(len(dataset.samples()))
dataset._samples = dataset.samples()
else:
dataset._samples = [dataset.samples()[i] for i in args.select]
samples = dataset.samples()
print("Found {} files in the dataset".format(len(dataset)))
with StreamingInputDataset(
dataset,
data_preprocessor,
text_preprocessor,
SimpleDataAugmenter(),
args.n_augmentations,
) as input_dataset:
f, ax = plt.subplots(args.n_rows, args.n_cols, sharey='all')
row, col = 0, 0
for i, (id, sample) in enumerate(
zip(args.select, input_dataset.generator(args.processes))):
line, text, params = sample
if args.n_cols == 1:
ax[row].imshow(line.transpose())
ax[row].set_title("ID: {}\n{}".format(id, text))
else:
ax[row, col].imshow(line.transpose())
ax[row, col].set_title("ID: {}\n{}".format(id, text))
row += 1
if row == args.n_rows:
row = 0
col += 1
if col == args.n_cols or i == len(samples) - 1:
plt.show()
f, ax = plt.subplots(args.n_rows, args.n_cols, sharey='all')
row, col = 0, 0
def run(args):
# check if loading a json file
if len(args.files) == 1 and args.files[0].endswith("json"):
import json
with open(args.files[0], 'r') as f:
json_args = json.load(f)
for key, value in json_args.items():
if key == 'dataset' or key == 'validation_dataset':
setattr(args, key, DataSetType.from_string(value))
else:
setattr(args, key, value)
# parse whitelist
whitelist = args.whitelist
if len(whitelist) == 1:
whitelist = list(whitelist[0])
whitelist_files = glob_all(args.whitelist_files)
for f in whitelist_files:
with open(f) as txt:
whitelist += list(txt.read())
if args.gt_extension is None:
args.gt_extension = DataSetType.gt_extension(args.dataset)
if args.validation_extension is None:
args.validation_extension = DataSetType.gt_extension(args.validation_dataset)
if args.text_generator_params is not None:
with open(args.text_generator_params, 'r') as f:
args.text_generator_params = json_format.Parse(f.read(), TextGeneratorParameters())
else:
args.text_generator_params = TextGeneratorParameters()
if args.line_generator_params is not None:
with open(args.line_generator_params, 'r') as f:
args.line_generator_params = json_format.Parse(f.read(), LineGeneratorParameters())
else:
args.line_generator_params = LineGeneratorParameters()
dataset_args = {
'line_generator_params': args.line_generator_params,
'text_generator_params': args.text_generator_params,
'pad': args.dataset_pad,
'text_index': args.pagexml_text_index,
}
# Training dataset
dataset = create_train_dataset(args, dataset_args)
# Validation dataset
if args.validation:
print("Resolving validation files")
validation_image_files = glob_all(args.validation)
if not args.validation_text_files:
val_txt_files = [split_all_ext(f)[0] + args.validation_extension for f in validation_image_files]
else:
val_txt_files = sorted(glob_all(args.validation_text_files))
validation_image_files, val_txt_files = keep_files_with_same_file_name(validation_image_files, val_txt_files)
for img, gt in zip(validation_image_files, val_txt_files):
if split_all_ext(os.path.basename(img))[0] != split_all_ext(os.path.basename(gt))[0]:
raise Exception("Expected identical basenames of validation file: {} and {}".format(img, gt))
if len(set(val_txt_files)) != len(val_txt_files):
raise Exception("Some validation images are occurring more than once in the data set.")
validation_dataset = create_dataset(
args.validation_dataset,
DataSetMode.TRAIN,
images=validation_image_files,
texts=val_txt_files,
skip_invalid=not args.no_skip_invalid_gt,
args=dataset_args,
)
print("Found {} files in the validation dataset".format(len(validation_dataset)))
else:
validation_dataset = None
params = CheckpointParams()
params.max_iters = args.max_iters
params.stats_size = args.stats_size
params.batch_size = args.batch_size
params.checkpoint_frequency = args.checkpoint_frequency if args.checkpoint_frequency >= 0 else args.early_stopping_frequency
params.output_dir = args.output_dir
params.output_model_prefix = args.output_model_prefix
params.display = args.display
params.skip_invalid_gt = not args.no_skip_invalid_gt
params.processes = args.num_threads
params.data_aug_retrain_on_original = not args.only_train_on_augmented
params.early_stopping_frequency = args.early_stopping_frequency
params.early_stopping_nbest = args.early_stopping_nbest
params.early_stopping_best_model_prefix = args.early_stopping_best_model_prefix
params.early_stopping_best_model_output_dir = \
args.early_stopping_best_model_output_dir if args.early_stopping_best_model_output_dir else args.output_dir
if args.data_preprocessing is None or len(args.data_preprocessing) == 0:
args.data_preprocessing = [DataPreprocessorParams.DEFAULT_NORMALIZER]
params.model.data_preprocessor.type = DataPreprocessorParams.MULTI_NORMALIZER
for preproc in args.data_preprocessing:
pp = params.model.data_preprocessor.children.add()
pp.type = DataPreprocessorParams.Type.Value(preproc) if isinstance(preproc, str) else preproc
pp.line_height = args.line_height
pp.pad = args.pad
# Text pre processing (reading)
params.model.text_preprocessor.type = TextProcessorParams.MULTI_NORMALIZER
default_text_normalizer_params(params.model.text_preprocessor.children.add(), default=args.text_normalization)
default_text_regularizer_params(params.model.text_preprocessor.children.add(), groups=args.text_regularization)
strip_processor_params = params.model.text_preprocessor.children.add()
strip_processor_params.type = TextProcessorParams.STRIP_NORMALIZER
# Text post processing (prediction)
params.model.text_postprocessor.type = TextProcessorParams.MULTI_NORMALIZER
default_text_normalizer_params(params.model.text_postprocessor.children.add(), default=args.text_normalization)
default_text_regularizer_params(params.model.text_postprocessor.children.add(), groups=args.text_regularization)
strip_processor_params = params.model.text_postprocessor.children.add()
strip_processor_params.type = TextProcessorParams.STRIP_NORMALIZER
if args.seed > 0:
params.model.network.backend.random_seed = args.seed
if args.bidi_dir:
# change bidirectional text direction if desired
bidi_dir_to_enum = {"rtl": TextProcessorParams.BIDI_RTL, "ltr": TextProcessorParams.BIDI_LTR,
"auto": TextProcessorParams.BIDI_AUTO}
bidi_processor_params = params.model.text_preprocessor.children.add()
bidi_processor_params.type = TextProcessorParams.BIDI_NORMALIZER
bidi_processor_params.bidi_direction = bidi_dir_to_enum[args.bidi_dir]
bidi_processor_params = params.model.text_postprocessor.children.add()
bidi_processor_params.type = TextProcessorParams.BIDI_NORMALIZER
bidi_processor_params.bidi_direction = TextProcessorParams.BIDI_AUTO
params.model.line_height = args.line_height
network_params_from_definition_string(args.network, params.model.network)
params.model.network.clipping_mode = NetworkParams.ClippingMode.Value("CLIP_" + args.gradient_clipping_mode.upper())
params.model.network.clipping_constant = args.gradient_clipping_const
params.model.network.backend.fuzzy_ctc_library_path = args.fuzzy_ctc_library_path
params.model.network.backend.num_inter_threads = args.num_inter_threads
params.model.network.backend.num_intra_threads = args.num_intra_threads
params.model.network.backend.shuffle_buffer_size = args.shuffle_buffer_size
# create the actual trainer
trainer = Trainer(params,
dataset,
validation_dataset=validation_dataset,
data_augmenter=SimpleDataAugmenter(),
n_augmentations=args.n_augmentations,
weights=args.weights,
codec_whitelist=whitelist,
keep_loaded_codec=args.keep_loaded_codec,
preload_training=not args.train_data_on_the_fly,
preload_validation=not args.validation_data_on_the_fly,
)
trainer.train(
auto_compute_codec=not args.no_auto_compute_codec,
progress_bar=not args.no_progress_bars
)
def main():
parser = argparse.ArgumentParser()
setup_train_args(parser)
args = parser.parse_args()
# check if loading a json file
if len(args.files) == 1 and args.files[0].endswith("json"):
import json
with open(args.files[0], 'r') as f:
json_args = json.load(f)
for key, value in json_args.items():
setattr(args, key, value)
# parse whitelist
whitelist = args.whitelist
whitelist_files = glob_all(args.whitelist_files)
for f in whitelist_files:
with open(f) as txt:
whitelist += list(txt.read())
# Training dataset
print("Resolving input files")
input_image_files = glob_all(args.files)
gt_txt_files = [split_all_ext(f)[0] + ".gt.txt" for f in input_image_files]
if len(set(gt_txt_files)) != len(gt_txt_files):
raise Exception("Some image are occurring more than once in the data set.")
dataset = FileDataSet(input_image_files, gt_txt_files, skip_invalid=not args.no_skip_invalid_gt)
print("Found {} files in the dataset".format(len(dataset)))
# Validation dataset
if args.validation:
print("Resolving validation files")
validation_image_files = glob_all(args.validation)
val_txt_files = [split_all_ext(f)[0] + ".gt.txt" for f in validation_image_files]
if len(set(val_txt_files)) != len(val_txt_files):
raise Exception("Some validation images are occurring more than once in the data set.")
validation_dataset = FileDataSet(validation_image_files, val_txt_files,
skip_invalid=not args.no_skip_invalid_gt)
print("Found {} files in the validation dataset".format(len(validation_dataset)))
else:
validation_dataset = None
params = CheckpointParams()
params.max_iters = args.max_iters
params.stats_size = args.stats_size
params.batch_size = args.batch_size
params.checkpoint_frequency = args.checkpoint_frequency
params.output_dir = args.output_dir
params.output_model_prefix = args.output_model_prefix
params.display = args.display
params.skip_invalid_gt = not args.no_skip_invalid_gt
params.processes = args.num_threads
params.early_stopping_frequency = args.early_stopping_frequency if args.early_stopping_frequency >= 0 else args.checkpoint_frequency
params.early_stopping_nbest = args.early_stopping_nbest
params.early_stopping_best_model_prefix = args.early_stopping_best_model_prefix
params.early_stopping_best_model_output_dir = \
args.early_stopping_best_model_output_dir if args.early_stopping_best_model_output_dir else args.output_dir
params.model.data_preprocessor.type = DataPreprocessorParams.DEFAULT_NORMALIZER
params.model.data_preprocessor.line_height = args.line_height
params.model.data_preprocessor.pad = args.pad
# Text pre processing (reading)
params.model.text_preprocessor.type = TextProcessorParams.MULTI_NORMALIZER
default_text_normalizer_params(params.model.text_preprocessor.children.add(), default=args.text_normalization)
default_text_regularizer_params(params.model.text_preprocessor.children.add(), groups=args.text_regularization)
strip_processor_params = params.model.text_preprocessor.children.add()
strip_processor_params.type = TextProcessorParams.STRIP_NORMALIZER
# Text post processing (prediction)
params.model.text_postprocessor.type = TextProcessorParams.MULTI_NORMALIZER
default_text_normalizer_params(params.model.text_postprocessor.children.add(), default=args.text_normalization)
default_text_regularizer_params(params.model.text_postprocessor.children.add(), groups=args.text_regularization)
strip_processor_params = params.model.text_postprocessor.children.add()
strip_processor_params.type = TextProcessorParams.STRIP_NORMALIZER
if args.seed > 0:
params.model.network.backend.random_seed = args.seed
if args.bidi_dir:
# change bidirectional text direction if desired
bidi_dir_to_enum = {"rtl": TextProcessorParams.BIDI_RTL, "ltr": TextProcessorParams.BIDI_LTR}
bidi_processor_params = params.model.text_preprocessor.children.add()
bidi_processor_params.type = TextProcessorParams.BIDI_NORMALIZER
bidi_processor_params.bidi_direction = bidi_dir_to_enum[args.bidi_dir]
bidi_processor_params = params.model.text_postprocessor.children.add()
bidi_processor_params.type = TextProcessorParams.BIDI_NORMALIZER
bidi_processor_params.bidi_direction = bidi_dir_to_enum[args.bidi_dir]
params.model.line_height = args.line_height
network_params_from_definition_string(args.network, params.model.network)
params.model.network.clipping_mode = NetworkParams.ClippingMode.Value("CLIP_" + args.gradient_clipping_mode.upper())
params.model.network.clipping_constant = args.gradient_clipping_const
params.model.network.backend.fuzzy_ctc_library_path = args.fuzzy_ctc_library_path
params.model.network.backend.num_inter_threads = args.num_inter_threads
params.model.network.backend.num_intra_threads = args.num_intra_threads
# create the actual trainer
trainer = Trainer(params,
dataset,
validation_dataset=validation_dataset,
data_augmenter=SimpleDataAugmenter(),
n_augmentations=args.n_augmentations,
weights=args.weights,
codec_whitelist=whitelist,
)
trainer.train(progress_bar=not args.no_progress_bars)